CLASSIFICATION OF ANGIOSPERMS. 657" 



FIG. 360. Primula (Primula obconica), one of several species of Primula which are 

 cultivated in greenhouses and as house plants. The leaves are circular heart-shaped, 

 long petiolate, and very hairy; the flowers are pinkish or lilac color and occur in umbels. 

 The hairs of this plant are very irritating, and cause a dermatitis similar to that produced 

 by poison ivy.' After Guernsey. 



species are found in Northern United States and Canada. Dur- 

 ing recent years it has been reported that the wild primrose (P. 

 farinosa) and also the cultivated species (P. obconica) possess 

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